The item is DZ09 Smartwatch with 2 slots design. It acts as a phone with a micro SIM card, you can also write and send messages via the Smart Watch. Expand its storage for MP3/MP4 files with a TF card, supports maximum 32G. Make and receive phone calls directly from the smart watch. Switch phone calls from the Smart Watch to your mobile device easily and conveniently. Fully compatible with Android Powered smart phones.